Ratchet tool

Abstract

The present invention provides a ratchet tool, wherein a circular tooth row is arranged into the round groove of the main body's actuating end. A tool driving seat is assembled rotatably onto the round groove of the main body. A first braking slot, a second braking slot and an arched control slot are triangularly configured onto the internal surface of the tool driving seat. The first and second braking slots are separately fitted with the first and second braking swing blocks. A moveable control gear is placed into the control slot and can shift to the through-hole at both ends of the control slot such that it is mated simultaneously with inner tip edges of the first and second braking swing blocks. An elastic resetter is additionally provided to make the first and second braking swing blocks with inner tip edge swing inwards in a normal state.

1. A ratchet tool comprising:
 a main body having a handle and an actuating end, said actuating end having a round groove with a circular tooth row formed on an inner periphery of said round groove; 
 a tool driving seat rotatably mounted onto one side of said round groove, said tool driving seat having a tool driving portion at an external end thereof, said tool driving seat having an internal end facing said round groove, said tool driving seat having a first braking slot and a second braking slot and a control slot triangularly configured onto an internal surface of said tool driving seat, said first braking slot being in spaced relation to said second braking slot, said control slot being an arc aligned with said circular tooth row, said control slot having a through-hole opening at opposite ends thereof, said through-hole separately connected to said first and second braking slots, said control slot having an open-ended exterior that is connected with said circular tooth row; 
 a first braking swing block positioned in said first braking slot, said first braking swing block having an outer tip edge and an inner tip edge arranged laterally thereon, said outer tip edge facing an external opening of said first braking slot corresponding to said circular tooth row, said inner tip edge facing said through-hole corresponding to said control slot, said first braking swing block having a first pivoted portion about which said first braking swing block swings; 
 a second braking swing block positioned into said second braking slot, said second braking swing block having an outer tip edge and an inner tip edge arranged laterally thereon, said outer tip edge of said second braking swing block facing an external opening of said second braking slot corresponding to said circular tooth row, said inner tip edge of said second braking swing block having a second pivoted portion about which said second braking swing block can swing; 
 an elastic resetter assembled between said first and second braking swing blocks, said elastic resetter suitable for driving ends of said first and second braking swing blocks such that the inner tip edges thereof swing inward in a normal state; 
 a movable control gear movably positioned in said control slot, said movable control gear having one side mated with said circular tooth row, said movable control gear shiftable to said through-hole so as to simultaneously mate with the inner tip edge of said first or second braking swing blocks and said circular tooth row, said movable control gear having a brake rod protruding outwardly of said control slot; and 
 a cover covering one side of said round groove of said tool driving seat, said cover having an arched hole through which said brake rod extends. 
 
     
     
       2. The ratchet tool of  claim 1 , said elastic resetter comprising a first elastic pin and a second elastic pin and a locating collar at an central section, said first and second braking slots having a location column in a space therebetween, said locating collar sleeving over said locating column, said first and second braking swing blocks having first and second insertion holes at ends thereof, said first and second elastic pins embedded respectively in said first and second insertion holes. 
     
     
       3. The ratchet tool of  claim 1 , said first pivoted portion and said second pivoted portion arranged in offset relationship adjacent the outer tip edges. 
     
     
       4. The ratchet tool of  claim 1 , said first pivoted portion and said second pivoted portion arranged on a flanged shaft, said cover having a first axle hole receiving said first pivoted portion. 
     
     
       5. The ratchet tool of  claim 4 , said first axle hole being an elongated hole. 
     
     
       6. The ratchet tool of  claim 1 , further comprising:
 a rotary table mounted at an exterior of said cover, said rotary table having a center assembled onto said cover by a spindle, said brake rod having a protruding end connected eccentrically to said rotary table. 
 
     
     
       7. The ratchet tool of  claim 6 , said rotary table and said cover having an elastic bead and a pair of spaced snapping edges thereon.